/*
 * Copyright (c) 2012 Jason Polites
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *     http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.isunland.managesystem.widget;

/**
 * @author Jason Polites
 */
@SuppressWarnings("all") public class Animator extends Thread {

  private GestureImageView view;
  private Animation animation;
  private boolean running = false;
  private boolean active = false;
  private long lastTime = -1L;

  public Animator(GestureImageView view, String threadName) {
    super(threadName);
    this.view = view;
  }

  @Override public void run() {

    running = true;

    while (running) {

      while (active && animation != null) {
        long time = System.currentTimeMillis();
        active = animation.update(view, time - lastTime);
        view.redraw();
        lastTime = time;

        while (active) {
          try {
            if (view.waitForDraw(32)) { // 30Htz
              break;
            }
          } catch (InterruptedException ignore) {
            active = false;
          }
        }
      }

      synchronized (this) {
        if (running) {
          try {
            wait();
          } catch (InterruptedException ignore) {
          }
        }
      }
    }
  }

  public synchronized void finish() {
    running = false;
    active = false;
    notifyAll();
  }

  public void play(Animation transformer) {
    if (active) {
      cancel();
    }
    this.animation = transformer;

    activate();
  }

  public synchronized void activate() {
    lastTime = System.currentTimeMillis();
    active = true;
    notifyAll();
  }

  public void cancel() {
    active = false;
  }
}
